One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

New York City's smallest piece of private property.

Try not to get slimed in Tribeca.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

The only one-room schoolhouse remaining in Talbot County, Maryland.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

The smallest covered bridge in Maryland.

A miniature city within a city, complete with traffic signs, signals, and streets to teach Baltimore's youth traffic safety laws.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

Hundreds of Buddhas in a re-discovered Indonesian temple.

Hindu temple of the dead home to hundreds of long-tailed macaques.